add zynq-rt

src/main.rs

@@ -2,11 +2,19 @@
 #![no_main]
 
 use core::panic::PanicInfo;
+use cortex_r_a::asm::nop;
+use cortex_r_a_rt as _;
 
 /// Entry point (not called like a normal main function)
 #[no_mangle]
-pub extern "C" fn _start() -> ! {
-    loop {}
+pub extern "C" fn kmain() -> ! {
+    main();
+}
+
+pub fn main() -> ! {
+    loop {
+        nop();
+    }
 }
 
 /// Panic handler